e39 540i m62tu starts and cuts out repeatedly

[ClintonWest]

Good day guys

my baby is giving me hassles....

i was happily driving along and she cut out. when i restart her she starts and cuts out repeatedly. OBD said left bank position sensor,
MAF sensor and throttle body/pedal position sensor problems. Maf is on order. i have replaced the cam position sensors on the left
and right bank as well as a prior reported faulty number 5 coil pack. fuel pressure at the schrader valve is 3,5 bar constant. i also have
a crank position sensor on order just so all my sensors are new. throttle body operates when the ignition is turned on. so i'm running
out of ideas here. still want to check the gasket where the throttle body mounts to the intake manifold for leaks.

just a further question... if one had to turn the ignition to on, without starting the car, if you tramp the excelerator, should the butterfly
valve in the throttle body move accordingly or only when the car is running?

any thoughts on the above, please guys i really know the solution is out there!!!

have a great day you all!

 

[Fordkoppie]

Have you tried unplugging the MAF, and then starting it?

And no the TB wont move even with the ignition on

 

[ClintonWest]

good day to you Fordkoppie. thank you for the advice. yes i did unplug the MAF, made no difference and thanx for the info
on the throttle body! i did find fuse F3 close to the DME computer blown so i replaced it. Now the car just cranks and wont
fire up at all. before it used to crank, try to start and die repeatedly, now that i replaced fuse F3 it just cranks and wont even
try to start at all! almost feals like replacing the fuse made it worse lol...

---

Update to the above...
Found fuse F3 in the engine compartment to be blown... with great anticipation, i replaced the fuse,
heald my breath and tried to start her again.... NOTHING!!!

this time the car just cranks and now does not fire at all!!!!! put my hand over the exhaust outlet,
good back pressure so assuming no blocked cat converters and also the smell of fuel, again assuming
the injectors are spraying into the cylinders... But i don't know if there is spark. my drive by wire throttle
body also throwing out OBD2 error codes so manually held throttle body open and squirted quick start,
still doesnt fire up.

fuel pressure 3.5bar at the shraeder valve and delivering fuel to the cylinders, throttle body open to ensure
air supply, quick start and crank yet still no ignition!!!!

so i have now gone from a repeating crank, start and die situation, (replaced F3 fuse in engine compartment)
to a crank no start one!

any help please guys!

will update if i find something new

thanx so much

 

[Fordkoppie]

This sounds like a typical CPS issue. Easiest to verify this would be to take one of the coil packs out, and insert a plug.... Hold against the engine, and let someone crank to see if there is spark.

I dearly hope for your financial wellbeing that this is not the case, but it could also be a broken timing chain guide, which caused the cam sprockets to jump teeth.

......a common M62 issue which basically totals the vehicle